Fernande Grudet, who under the name Madame Claude operated a deluxe call-girl ring in Paris in the 1960s and ‘70s that attracted the patronage of world leaders, business executives and playboys and made her a byword for sophisticated sex, died on Saturday in Nice. She was 92. * “Two things in life sell,†she once said. “Food and sex. And I was not meant to be a chef.†Precisely how she built her business remains a mystery, despite two memoirs, larded with colorful and eminently uncheckable stories. But build it she did, grooming a finishing school’s worth of beautiful young...